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CAS number 689-99-6 YesY
PubChem 136491
ChemSpider 120260
Jmol-3D images Image 1
Molecular formula C2F2
Molar mass 62.02 g mol−1
Related compounds
Related compounds Dichloroacetylene
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Difluoroacetylene, C2F2, is a compound of carbon and fluorine. A linear molecule, its two carbons are joined by a triple bond and have terminal fluorines: F-C≡C-F. The molecule is the perfluorocarbon analog of acetylene, C2H2. Preparation of difluoracetylene is difficult, with danger of explosions and with low yields. Nevertheless, the compound has been made, isolated, and characterized by NMR and IR spectroscopy. The compound is of interest as a precursor to fluoropolymers containing double bonds, analogous to polyacetylene.


  • Trifu, Roxana Melita (1999). Homopolymers of dihaloacetylenes (Ph.D. thesis, University of Illinois at Chicago). ProQuest.